UnsupportedOperationException：在特權進程中不允許使用WebView

Question

我在清單中使用android:sharedUserId="android.uid.system"來獲得一些不可避免的權限。 （從Android box讀取HDMI輸入）

我的應用也使用webview來提供重要功能。 但是用webView和android:sharedUserId="android.uid.system"導致以下異常（API級23，根設備，系統應用程序）的組合：java.lang.UnsupportedOperationException: For security reasons, WebView is not allowed in privileged processes

1. 請提出的解決方案同時使用：

   致結合。

2. 這些安全原因是什麼？

完整的堆棧跟蹤：

android.view.InflateException: Binary XML file line #40: Binary XML file line #40: Error inflating class android.webkit.WebView 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:539) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
    at com.blynq.app.fragments.PlayerPane.onCreateView(PlayerPane.java:200) 
    at android.app.Fragment.performCreateView(Fragment.java:2220) 
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:973) 
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1148) 
    at android.app.BackStackRecord.run(BackStackRecord.java:793) 
    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1535) 
    at android.app.FragmentManagerImpl$1.run(FragmentManager.java:482) 
    at android.os.Handler.handleCallback(Handler.java:739) 
    at android.os.Handler.dispatchMessage(Handler.java:95) 
    at android.os.Looper.loop(Looper.java:148) 
    at android.app.ActivityThread.main(ActivityThread.java:5453) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: android.view.InflateException: Binary XML file line #40: Error inflating class android.webkit.WebView 
    at android.view.LayoutInflater.createView(LayoutInflater.java:645) 
    at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694) 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762) 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:835) 
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:423)  
    at com.blynq.app.fragments.PlayerPane.onCreateView(PlayerPane.java:200)  
    at android.app.Fragment.performCreateView(Fragment.java:2220)  
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:973)  
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1148)  
    at android.app.BackStackRecord.run(BackStackRecord.java:793)  
    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1535)  
    at android.app.FragmentManagerImpl$1.run(FragmentManager.java:482)  
    at android.os.Handler.handleCallback(Handler.java:739)  
    at android.os.Handler.dispatchMessage(Handler.java:95)  
    at android.os.Looper.loop(Looper.java:148)  
    at android.app.ActivityThread.main(ActivityThread.java:5453)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  
Caused by: java.lang.reflect.InvocationTargetException 
    at java.lang.reflect.Constructor.newInstance(Native Method) 
    at android.view.LayoutInflater.createView(LayoutInflater.java:619) 
    at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)  
    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694)  
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762)  
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)  
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)  
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:423)  
    at com.blynq.app.fragments.PlayerPane.onCreateView(PlayerPane.java:200)  
    at android.app.Fragment.performCreateView(Fragment.java:2220)  
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:973)  
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1148)  
    at android.app.BackStackRecord.run(BackStackRecord.java:793)  
    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1535)  
    at android.app.FragmentManagerImpl$1.run(FragmentManager.java:482)  
    at android.os.Handler.handleCallback(Handler.java:739)  
    at android.os.Handler.dispatchMessage(Handler.java:95)  
    at android.os.Looper.loop(Looper.java:148)  
    at android.app.ActivityThread.main(ActivityThread.java:5453)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  

Caused by: java.lang.UnsupportedOperationException: For security reasons, WebView is not allowed in privileged processes 
    at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:159) 
    at android.webkit.WebView.getFactory(WebView.java:2277) 
    at android.webkit.WebView.ensureProviderCreated(WebView.java:2272) 
    at android.webkit.WebView.setOverScrollMode(WebView.java:2331) 
    at android.view.View.<init>(View.java:3795) 
    at android.view.View.<init>(View.java:3898) 
    at android.view.ViewGroup.<init>(ViewGroup.java:573) 
    at android.widget.AbsoluteLayout.<init>(AbsoluteLayout.java:55) 
    at android.webkit.WebView.<init>(WebView.java:597) 
    at android.webkit.WebView.<init>(WebView.java:542) 
    at android.webkit.WebView.<init>(WebView.java:525) 
    at android.webkit.WebView.<init>(WebView.java:512) 
    at java.lang.reflect.Constructor.newInstance(Native Method)  
    at android.view.LayoutInflater.createView(LayoutInflater.java:619)  
    at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)  
    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694)  
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762)  
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)  
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)  
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:423)  
    at com.blynq.app.fragments.PlayerPane.onCreateView(PlayerPane.java:200)  
    at android.app.Fragment.performCreateView(Fragment.java:2220)  
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:973)  
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1148)  
    at android.app.BackStackRecord.run(BackStackRecord.java:793)  
    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1535)  
    at android.app.FragmentManagerImpl$1.run(FragmentManager.java:482)  
    at android.os.Handler.handleCallback(Handler.java:739)  
    at android.os.Handler.dispatchMessage(Handler.java:95)  
    at android.os.Looper.loop(Looper.java:148)  
    at android.app.ActivityThread.main(ActivityThread.java:5453)  
    at java.lang.reflect.Method.invoke(Native Method)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  

Answer 1

刪除android:sharedUserId="android.uid.system"並安裝應用程序的系統應用

請按照以下步驟來安裝應用程序的系統應用：

1. 根的Android設備
2. 使用adb connect IP:5555連接到設備
3. 安裝應用作爲用戶應用程序（可以使用adb install app_name.apk）
4. adb shell mount -o rw,remount,rw /system
5. adb shell mv /data/app/<package_name>-1 /system/app/（移至應用程序資源從/數據目錄/系統目錄）
6. 重啓Android裝置